add After=network.target as suggested by upstream arch bug #31478

git-svn-id: svn://svn.transmissionbt.com/Transmission/trunk@14122 f4695dd4-2c0a-0410-b89c-da849a56a58e
change the callback functions' orders s.t. torrent-completed is called before torrent-done

git-svn-id: svn://svn.transmissionbt.com/Transmission/trunk@14123 f4695dd4-2c0a-0410-b89c-da849a56a58e